﻿using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

namespace XC.Library
{
    class FtpOpt
    {
        /// <summary>
        /// FTP处理操作类
        /// 功能：
        /// 下载文件
        /// 上传文件
        /// 上传文件的进度信息
        /// 下载文件的进度信息
        /// 删除文件
        /// 列出文件
        /// 列出目录
        /// 进入子目录
        /// 退出当前目录返回上一层目录
        /// 判断远程文件是否存在
        /// 判断远程文件是否存在
        /// 删除远程文件    
        /// 建立目录
        /// 删除目录
        /// 文件（目录）改名
        /// </summary>
        /// <remarks>
        /// 创建时间：2016年6月3日
        /// </remarks>
        #region 文件信息结构
        public struct FileStruct
        {
            public string Flags;
            public string Owner;
            public string Group;
            public bool IsDirectory;
            public DateTime CreateTime;
            public string Name;
        }
        public enum FileListStyle
        {
            UnixStyle,
            WindowsStyle,
            Unknown
        }
        #endregion
        public class ClsFtp
        {
            #region 属性信息
            /// <summary>
            /// FTP请求对象
            /// </summary>
            FtpWebRequest Request = null;
            /// <summary>
            /// FTP响应对象
            /// </summary>
            FtpWebResponse Response = null;
            /// <summary>
            /// FTP服务器地址
            /// </summary>
            private Uri _Uri;
            /// <summary>
            /// FTP服务器地址
            /// </summary>
            public Uri Uri
            {
                get
                {
                    if (_DirectoryPath == "/")
                    {
                        return _Uri;
                    }
                    else
                    {
                        string strUri = _Uri.ToString();
                        if (strUri.EndsWith("/"))
                        {
                            strUri = strUri.Substring(0, strUri.Length - 1);
                        }
                        return new Uri(strUri + this.DirectoryPath);
                    }
                }
                set
                {
                    if (value.Scheme != Uri.UriSchemeFtp)
                    {
                        throw new Exception("Ftp 地址格式错误!");
                    }
                    _Uri = new Uri(value.GetLeftPart(UriPartial.Authority));
                    _DirectoryPath = value.AbsolutePath;
                    if (!_DirectoryPath.EndsWith("/"))
                    {
                        _DirectoryPath += "/";
                    }
                }
            }

            /// <summary>
            /// 当前工作目录
            /// </summary>
            private string _DirectoryPath;

            /// <summary>
            /// 当前工作目录
            /// </summary>
            public string DirectoryPath
            {
                get { return _DirectoryPath; }
                set { _DirectoryPath = value; }
            }

            /// <summary>
            /// FTP登录用户
            /// </summary>
            private string _UserName;
            /// <summary>
            /// FTP登录用户
            /// </summary>
            public string UserName
            {
                get { return _UserName; }
                set { _UserName = value; }
            }

            /// <summary>
            /// 错误信息
            /// </summary>
            private string _ErrorMsg;
            /// <summary>
            /// 错误信息
            /// </summary>
            public string ErrorMsg
            {
                get { return _ErrorMsg; }
                set { _ErrorMsg = value; }
            }

            /// <summary>
            /// FTP登录密码
            /// </summary>
            private string _Password;
            /// <summary>
            /// FTP登录密码
            /// </summary>
            public string Password
            {
                get { return _Password; }
                set { _Password = value; }
            }

            /// <summary>
            /// 连接FTP服务器的代理服务
            /// </summary>
            private WebProxy _Proxy = null;
            /// <summary>
            /// 连接FTP服务器的代理服务
            /// </summary>
            public WebProxy Proxy
            {
                get
                {
                    return _Proxy;
                }
                set
                {
                    _Proxy = value;
                }
            }

            /// <summary>
            /// 是否需要删除临时文件
            /// </summary>
            private bool _isDeleteTempFile = false;
            /// <summary>
            /// 异步上传所临时生成的文件
            /// </summary>
            private string _UploadTempFile = "";
            #endregion

            #region 事件
            public delegate void De_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e);
            public delegate void De_DownloadDataCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e);
            public delegate void De_UploadProgressChanged(object sender, UploadProgressChangedEventArgs e);
            public delegate void De_UploadFileCompleted(object sender, UploadFileCompletedEventArgs e);

            /// <summary>
            /// 异步下载进度发生改变触发的事件
            /// </summary>
            public event De_DownloadProgressChanged DownloadProgressChanged;
            /// <summary>
            /// 异步下载文件完成之后触发的事件
            /// </summary>
            public event De_DownloadDataCompleted DownloadDataCompleted;
            /// <summary>
            /// 异步上传进度发生改变触发的事件
            /// </summary>
            public event De_UploadProgressChanged UploadProgressChanged;
            /// <summary>
            /// 异步上传文件完成之后触发的事件
            /// </summary>
            public event De_UploadFileCompleted UploadFileCompleted;
            #endregion

            #region 构造/析构函数
            /// <summary>
            /// 构造函数
            /// </summary>
            /// <param name="FtpUri">FTP地址</param>
            /// <param name="strUserName">登录用户名</param>
            /// <param name="strPassword">登录密码</param>
            public ClsFtp(Uri FtpUri, string strUserName, string strPassword)
            {
                this._Uri = new Uri(FtpUri.GetLeftPart(UriPartial.Authority));
                _DirectoryPath = FtpUri.AbsolutePath;
                if (!_DirectoryPath.EndsWith("/"))
                {
                    _DirectoryPath += "/";
                }
                this._UserName = strUserName;
                this._Password = strPassword;
                this._Proxy = null;
            }
            /// <summary>
            /// 构造函数
            /// </summary>
            /// <param name="FtpUri">FTP地址</param>
            /// <param name="strUserName">登录用户名</param>
            /// <param name="strPassword">登录密码</param>
            /// <param name="objProxy">连接代理</param>
            public ClsFtp(Uri FtpUri, string strUserName, string strPassword, WebProxy objProxy)
            {
                this._Uri = new Uri(FtpUri.GetLeftPart(UriPartial.Authority));
                _DirectoryPath = FtpUri.AbsolutePath;
                if (!_DirectoryPath.EndsWith("/"))
                {
                    _DirectoryPath += "/";
                }
                this._UserName = strUserName;
                this._Password = strPassword;
                this._Proxy = objProxy;
            }
            /// <summary>
            /// 构造函数
            /// </summary>
            public ClsFtp()
            {
                this._UserName = "anonymous";  //匿名用户
                this._Password = "@anonymous";
                this._Uri = null;
                this._Proxy = null;
            }

            /// <summary>
            /// 析构函数
            /// </summary>
            ~ClsFtp()
            {
                if (Response != null)
                {
                    Response.Close();
                    Response = null;
                }
                if (Request != null)
                {
                    Request.Abort();
                    Request = null;
                }
            }
            #endregion

            #region 建立连接
            /// <summary>
            /// 建立FTP链接,返回响应对象
            /// </summary>
            /// <param name="uri">FTP地址</param>
            /// <param name="FtpMathod">操作命令</param>
            private FtpWebResponse Open(Uri uri, string FtpMathod)
            {
                try
                {
                    Request = (FtpWebRequest)WebRequest.Create(uri);
                    Request.Method = FtpMathod;
                    Request.UseBinary = true;
                    Request.Credentials = new NetworkCredential(this.UserName, this.Password);
                    if (this.Proxy != null)
                    {
                        Request.Proxy = this.Proxy;
                    }
                    return (FtpWebResponse)Request.GetResponse();
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 建立FTP链接,返回请求对象
            /// </summary>
            /// <param name="uri">FTP地址</param>
            /// <param name="FtpMathod">操作命令</param>
            private FtpWebRequest OpenRequest(Uri uri, string FtpMathod)
            {
                try
                {
                    Request = (FtpWebRequest)WebRequest.Create(uri);
                    Request.Method = FtpMathod;
                    Request.UseBinary = true;
                    Request.Credentials = new NetworkCredential(this.UserName, this.Password);
                    if (this.Proxy != null)
                    {
                        Request.Proxy = this.Proxy;
                    }
                    return Request;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 下载文件

            /// <summary>
            /// 从FTP服务器下载文件，使用与远程文件同名的文件名来保存文件
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            /// <param name="LocalPath">本地路径</param>

            public bool DownloadFile(string RemoteFileName, string LocalPath)
            {
                return DownloadFile(RemoteFileName, LocalPath, RemoteFileName);
            }
            /// <summary>
            /// 从FTP服务器下载文件，指定本地路径和本地文件名
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            /// <param name="LocalPath">本地路径</param>
            /// <param name="LocalFilePath">保存文件的本地路径,后面带有"\"</param>
            /// <param name="LocalFileName">保存本地的文件名</param>
            public bool DownloadFile(string RemoteFileName, string LocalPath, string LocalFileName)
            {
                byte[] bt = null;
                try
                {
                    if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(LocalFileName) || !IsValidPathChars(LocalPath))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    if (!Directory.Exists(LocalPath))
                    {
                        throw new Exception("本地文件路径不存在!");
                    }

                    string LocalFullPath = Path.Combine(LocalPath, LocalFileName);
                    if (File.Exists(LocalFullPath))
                    {
                        throw new Exception("当前路径下已经存在同名文件！");
                    }
                    bt = DownloadFile(RemoteFileName);
                    if (bt != null)
                    {
                        FileStream stream = new FileStream(LocalFullPath, FileMode.Create);
                        stream.Write(bt, 0, bt.Length);
                        stream.Flush();
                        stream.Close();
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }

            /// <summary>
            /// 从FTP服务器下载文件，返回文件二进制数据
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            public byte[] DownloadFile(string RemoteFileName)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    Response = Open(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.DownloadFile);
                    Stream Reader = Response.GetResponseStream();

                    MemoryStream mem = new MemoryStream(1024 * 500);
                    byte[] buffer = new byte[1024];
                    int bytesRead = 0;
                    int TotalByteRead = 0;
                    while (true)
                    {
                        bytesRead = Reader.Read(buffer, 0, buffer.Length);
                        TotalByteRead += bytesRead;
                        if (bytesRead == 0)
                            break;
                        mem.Write(buffer, 0, bytesRead);
                    }
                    if (mem.Length > 0)
                    {
                        return mem.ToArray();
                    }
                    else
                    {
                        return null;
                    }
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 异步下载文件
            /// <summary>
            /// 从FTP服务器异步下载文件，指定本地路径和本地文件名
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>        
            /// <param name="LocalPath">保存文件的本地路径,后面带有"\"</param>
            /// <param name="LocalFileName">保存本地的文件名</param>
            public void DownloadFileAsync(string RemoteFileName, string LocalPath, string LocalFileName)
            {
                //byte[] bt = null;
                try
                {
                    if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(LocalFileName) || !IsValidPathChars(LocalPath))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    if (!Directory.Exists(LocalPath))
                    {
                        throw new Exception("本地文件路径不存在!");
                    }

                    string LocalFullPath = Path.Combine(LocalPath, LocalFileName);
                    if (File.Exists(LocalFullPath))
                    {
                        throw new Exception("当前路径下已经存在同名文件！");
                    }
                    DownloadFileAsync(RemoteFileName, LocalFullPath);

                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }

            /// <summary>
            /// 从FTP服务器异步下载文件，指定本地完整路径文件名
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            /// <param name="LocalFullPath">本地完整路径文件名</param>
            public void DownloadFileAsync(string RemoteFileName, string LocalFullPath)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    if (File.Exists(LocalFullPath))
                    {
                        throw new Exception("当前路径下已经存在同名文件！");
                    }
                    MyWebClient client = new MyWebClient();

                    client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
                    client.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(client_DownloadFileCompleted);
                    client.Credentials = new NetworkCredential(this.UserName, this.Password);
                    if (this.Proxy != null)
                    {
                        client.Proxy = this.Proxy;
                    }
                    client.DownloadFileAsync(new Uri(this.Uri.ToString() + RemoteFileName), LocalFullPath);
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }

            /// <summary>
            /// 异步下载文件完成之后触发的事件
            /// </summary>
            /// <param name="sender">下载对象</param>
            /// <param name="e">数据信息对象</param>
            void client_DownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
            {
                if (DownloadDataCompleted != null)
                {
                    DownloadDataCompleted(sender, e);
                }
            }

            /// <summary>
            /// 异步下载进度发生改变触发的事件
            /// </summary>
            /// <param name="sender">下载对象</param>
            /// <param name="e">进度信息对象</param>
            void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
            {
                if (DownloadProgressChanged != null)
                {
                    DownloadProgressChanged(sender, e);
                }
            }
            #endregion

            #region 上传文件
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件名</param>
            public bool UploadFile(string LocalFullPath)
            {
                return UploadFile(LocalFullPath, Path.GetFileName(LocalFullPath), false);
            }
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public bool UploadFile(string LocalFullPath, bool OverWriteRemoteFile)
            {
                return UploadFile(LocalFullPath, Path.GetFileName(LocalFullPath), OverWriteRemoteFile);
            }
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            public bool UploadFile(string LocalFullPath, string RemoteFileName)
            {
                return UploadFile(LocalFullPath, RemoteFileName, false);
            }
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件名</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public bool UploadFile(string LocalFullPath, string RemoteFileName, bool OverWriteRemoteFile)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(Path.GetFileName(LocalFullPath)) || !IsValidPathChars(Path.GetDirectoryName(LocalFullPath)))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    if (File.Exists(LocalFullPath))
                    {
                        FileStream Stream = new FileStream(LocalFullPath, FileMode.Open, FileAccess.Read);
                        byte[] bt = new byte[Stream.Length];
                        Stream.Read(bt, 0, (Int32)Stream.Length);   //注意，因为Int32的最大限制，最大上传文件只能是大约2G多一点
                        Stream.Close();
                        return UploadFile(bt, RemoteFileName, OverWriteRemoteFile);
                    }
                    else
                    {
                        throw new Exception("本地文件不存在!");
                    }
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.Message;
                    throw ep;
                }
            }
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="FileBytes">上传的二进制数据</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            public bool UploadFile(byte[] FileBytes, string RemoteFileName)
            {
                if (!IsValidFileChars(RemoteFileName))
                {
                    throw new Exception("非法文件名或目录名!");
                }
                return UploadFile(FileBytes, RemoteFileName, false);
            }
            /// <summary>
            /// 上传文件到FTP服务器
            /// </summary>
            /// <param name="FileBytes">文件二进制内容</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public bool UploadFile(byte[] FileBytes, string RemoteFileName, bool OverWriteRemoteFile)
            {
                bool result = true;
                try
                {
                    if (!IsValidFileChars(RemoteFileName))
                    {
                        result = false;
                        throw new Exception("非法文件名！");

                    }
                    if (!OverWriteRemoteFile && FileExist(RemoteFileName))
                    {
                        result = false;
                        throw new Exception("FTP服务上面已经存在同名文件！");
                    }
                    Response = Open(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.UploadFile);
                    Stream requestStream = Request.GetRequestStream();
                    MemoryStream mem = new MemoryStream(FileBytes);

                    byte[] buffer = new byte[1024];
                    int bytesRead = 0;
                    int TotalRead = 0;
                    while (true)
                    {
                        bytesRead = mem.Read(buffer, 0, buffer.Length);
                        if (bytesRead == 0)
                            break;
                        TotalRead += bytesRead;
                        requestStream.Write(buffer, 0, bytesRead);
                    }
                    requestStream.Close();
                    Response = (FtpWebResponse)Request.GetResponse();
                    mem.Close();
                    mem.Dispose();
                    FileBytes = null;
                    result = true;
                }
                catch (Exception ep)
                {
                    result = false;
                    ErrorMsg = ep.Message;
                    throw ep;
                }
                return result;
            }
            #endregion

            #region 异步上传文件
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件名</param>
            public void UploadFileAsync(string LocalFullPath)
            {
                UploadFileAsync(LocalFullPath, Path.GetFileName(LocalFullPath), false);
            }
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public void UploadFileAsync(string LocalFullPath, bool OverWriteRemoteFile)
            {
                UploadFileAsync(LocalFullPath, Path.GetFileName(LocalFullPath), OverWriteRemoteFile);
            }
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            public void UploadFileAsync(string LocalFullPath, string RemoteFileName)
            {
                UploadFileAsync(LocalFullPath, RemoteFileName, false);
            }
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="LocalFullPath">本地带有完整路径的文件名</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public void UploadFileAsync(string LocalFullPath, string RemoteFileName, bool OverWriteRemoteFile)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(Path.GetFileName(LocalFullPath)) || !IsValidPathChars(Path.GetDirectoryName(LocalFullPath)))
                    {
                        throw new Exception("非法文件名或目录名!");
                    }
                    if (!OverWriteRemoteFile && FileExist(RemoteFileName))
                    {
                        throw new Exception("FTP服务上面已经存在同名文件！");
                    }
                    if (File.Exists(LocalFullPath))
                    {
                        MyWebClient client = new MyWebClient();

                        client.UploadProgressChanged += new UploadProgressChangedEventHandler(client_UploadProgressChanged);
                        client.UploadFileCompleted += new UploadFileCompletedEventHandler(client_UploadFileCompleted);
                        client.Credentials = new NetworkCredential(this.UserName, this.Password);
                        if (this.Proxy != null)
                        {
                            client.Proxy = this.Proxy;
                        }
                        client.UploadFileAsync(new Uri(this.Uri.ToString() + RemoteFileName), LocalFullPath);

                    }
                    else
                    {
                        throw new Exception("本地文件不存在!");
                    }
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="FileBytes">上传的二进制数据</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            public void UploadFileAsync(byte[] FileBytes, string RemoteFileName)
            {
                if (!IsValidFileChars(RemoteFileName))
                {
                    throw new Exception("非法文件名或目录名!");
                }
                UploadFileAsync(FileBytes, RemoteFileName, false);
            }
            /// <summary>
            /// 异步上传文件到FTP服务器
            /// </summary>
            /// <param name="FileBytes">文件二进制内容</param>
            /// <param name="RemoteFileName">要在FTP服务器上面保存文件名</param>
            /// <param name="OverWriteRemoteFile">是否覆盖远程服务器上面同名的文件</param>
            public void UploadFileAsync(byte[] FileBytes, string RemoteFileName, bool OverWriteRemoteFile)
            {
                try
                {

                    if (!IsValidFileChars(RemoteFileName))
                    {
                        throw new Exception("非法文件名！");
                    }
                    if (!OverWriteRemoteFile && FileExist(RemoteFileName))
                    {
                        throw new Exception("FTP服务上面已经存在同名文件！");
                    }
                    string TempPath = System.Environment.GetFolderPath(Environment.SpecialFolder.Templates);
                    if (!TempPath.EndsWith("\\"))
                    {
                        TempPath += "\\";
                    }
                    string TempFile = TempPath + Path.GetRandomFileName();
                    TempFile = Path.ChangeExtension(TempFile, Path.GetExtension(RemoteFileName));
                    FileStream Stream = new FileStream(TempFile, FileMode.CreateNew, FileAccess.Write);
                    Stream.Write(FileBytes, 0, FileBytes.Length);   //注意，因为Int32的最大限制，最大上传文件只能是大约2G多一点
                    Stream.Flush();
                    Stream.Close();
                    Stream.Dispose();
                    _isDeleteTempFile = true;
                    _UploadTempFile = TempFile;
                    FileBytes = null;
                    UploadFileAsync(TempFile, RemoteFileName, OverWriteRemoteFile);



                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }

            /// <summary>
            /// 异步上传文件完成之后触发的事件
            /// </summary>
            /// <param name="sender">下载对象</param>
            /// <param name="e">数据信息对象</param>
            void client_UploadFileCompleted(object sender, UploadFileCompletedEventArgs e)
            {
                if (_isDeleteTempFile)
                {
                    if (File.Exists(_UploadTempFile))
                    {
                        File.SetAttributes(_UploadTempFile, FileAttributes.Normal);
                        File.Delete(_UploadTempFile);
                    }
                    _isDeleteTempFile = false;
                }
                if (UploadFileCompleted != null)
                {
                    UploadFileCompleted(sender, e);
                }
            }

            /// <summary>
            /// 异步上传进度发生改变触发的事件
            /// </summary>
            /// <param name="sender">下载对象</param>
            /// <param name="e">进度信息对象</param>
            void client_UploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
            {
                if (UploadProgressChanged != null)
                {
                    UploadProgressChanged(sender, e);
                }
            }
            #endregion

            #region 列出目录文件信息
            /// <summary>
            /// 列出FTP服务器上面当前目录的所有文件和目录
            /// </summary>
            public FileStruct[] ListFilesAndDirectories()
            {
                Response = Open(this.Uri, WebRequestMethods.Ftp.ListDirectoryDetails);
                StreamReader stream = new StreamReader(Response.GetResponseStream(), Encoding.Default);
                string Datastring = stream.ReadToEnd();
                FileStruct[] list = GetList(Datastring);
                return list;
            }
            /// <summary>
            /// 列出FTP服务器上面当前目录的所有文件
            /// </summary>
            public FileStruct[] ListFiles()
            {
                FileStruct[] listAll = ListFilesAndDirectories();
                List<FileStruct> listFile = new List<FileStruct>();
                foreach (FileStruct file in listAll)
                {
                    if (!file.IsDirectory)
                    {
                        listFile.Add(file);
                    }
                }
                return listFile.ToArray();
            }

            /// <summary>
            /// 列出FTP服务器上面当前目录的所有文件名
            /// </summary>
            public string[] ListFileNames()
            {
                FileStruct[] listAll = ListFilesAndDirectories();
                List<string> listFile = new List<string>();
                foreach (FileStruct file in listAll)
                {
                    if (!file.IsDirectory)
                    {
                        listFile.Add(file.Name);
                    }
                }
                return listFile.ToArray();
            }

            /// <summary>
            /// 列出FTP服务器上面当前目录的所有的目录
            /// </summary>
            public FileStruct[] ListDirectories()
            {
                FileStruct[] listAll = ListFilesAndDirectories();
                List<FileStruct> listDirectory = new List<FileStruct>();
                foreach (FileStruct file in listAll)
                {
                    if (file.IsDirectory)
                    {
                        listDirectory.Add(file);
                    }
                }
                return listDirectory.ToArray();
            }
            /// <summary>
            /// 获得文件和目录列表
            /// </summary>
            /// <param name="datastring">FTP返回的列表字符信息</param>
            private FileStruct[] GetList(string datastring)
            {
                List<FileStruct> myListArray = new List<FileStruct>();
                string[] dataRecords = datastring.Split('\n');
                FileListStyle _directoryListStyle = GuessFileListStyle(dataRecords);
                foreach (string s in dataRecords)
                {
                    if (_directoryListStyle != FileListStyle.Unknown && s != "")
                    {
                        FileStruct f = new FileStruct();
                        f.Name = "..";
                        switch (_directoryListStyle)
                        {
                            case FileListStyle.UnixStyle:
                                f = ParseFileStructFromUnixStyleRecord(s);
                                break;
                            case FileListStyle.WindowsStyle:
                                f = ParseFileStructFromWindowsStyleRecord(s);
                                break;
                        }
                        if (!(f.Name == "." || f.Name == ".."))
                        {
                            myListArray.Add(f);
                        }
                    }
                }
                return myListArray.ToArray();
            }

            /// <summary>
            /// 从Windows格式中返回文件信息
            /// </summary>
            /// <param name="Record">文件信息</param>
            private FileStruct ParseFileStructFromWindowsStyleRecord(string Record)
            {
                FileStruct f = new FileStruct();
                string processstr = Record.Trim();
                string dateStr = processstr.Substring(0, 8);
                processstr = (processstr.Substring(8, processstr.Length - 8)).Trim();
                string timeStr = processstr.Substring(0, 7);
                processstr = (processstr.Substring(7, processstr.Length - 7)).Trim();
                DateTimeFormatInfo myDTFI = new CultureInfo("en-US", false).DateTimeFormat;
                myDTFI.ShortTimePattern = "t";
                f.CreateTime = DateTime.Parse(dateStr + " " + timeStr, myDTFI);
                if (processstr.Substring(0, 5) == "<DIR>")
                {
                    f.IsDirectory = true;
                    processstr = (processstr.Substring(5, processstr.Length - 5)).Trim();
                }
                else
                {
                    string[] strs = processstr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);   // true);
                    processstr = strs[1];
                    f.IsDirectory = false;
                }
                f.Name = processstr;
                return f;
            }


            /// <summary>
            /// 判断文件列表的方式Window方式还是Unix方式
            /// </summary>
            /// <param name="recordList">文件信息列表</param>
            private FileListStyle GuessFileListStyle(string[] recordList)
            {
                foreach (string s in recordList)
                {
                    if (s.Length > 10
                     && Regex.IsMatch(s.Substring(0, 10), "(-|d)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)"))
                    {
                        return FileListStyle.UnixStyle;
                    }
                    else if (s.Length > 8
                     && Regex.IsMatch(s.Substring(0, 8), "[0-9][0-9]-[0-9][0-9]-[0-9][0-9]"))
                    {
                        return FileListStyle.WindowsStyle;
                    }
                }
                return FileListStyle.Unknown;
            }

            /// <summary>
            /// 从Unix格式中返回文件信息
            /// </summary>
            /// <param name="Record">文件信息</param>
            private FileStruct ParseFileStructFromUnixStyleRecord(string Record)
            {
                FileStruct f = new FileStruct();
                string processstr = Record.Trim();
                f.Flags = processstr.Substring(0, 10);
                f.IsDirectory = (f.Flags[0] == 'd');
                processstr = (processstr.Substring(11)).Trim();
                _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //跳过一部分
                f.Owner = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
                f.Group = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);
                _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //跳过一部分
                string yearOrTime = processstr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)[2];
                if (yearOrTime.IndexOf(":") >= 0)  //time
                {
                    processstr = processstr.Replace(yearOrTime, DateTime.Now.Year.ToString());
                }
                f.CreateTime = DateTime.Parse(_cutSubstringFromStringWithTrim(ref processstr, ' ', 8));
                f.Name = processstr;   //最后就是名称
                return f;
            }

            /// <summary>
            /// 按照一定的规则进行字符串截取
            /// </summary>
            /// <param name="s">截取的字符串</param>
            /// <param name="c">查找的字符</param>
            /// <param name="startIndex">查找的位置</param>
            private string _cutSubstringFromStringWithTrim(ref string s, char c, int startIndex)
            {
                int pos1 = s.IndexOf(c, startIndex);
                string retString = s.Substring(0, pos1);
                s = (s.Substring(pos1)).Trim();
                return retString;
            }
            #endregion

            #region 目录或文件存在的判断
            /// <summary>
            /// 判断当前目录下指定的子目录是否存在
            /// </summary>
            /// <param name="RemoteDirectoryName">指定的目录名</param>
            public bool DirectoryExist(string RemoteDirectoryName)
            {
                try
                {
                    if (!IsValidPathChars(RemoteDirectoryName))
                    {
                        throw new Exception("目录名非法！");
                    }
                    FileStruct[] listDir = ListDirectories();
                    foreach (FileStruct dir in listDir)
                    {
                        if (dir.Name == RemoteDirectoryName)
                        {
                            return true;
                        }
                    }
                    return false;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 判断一个远程文件是否存在服务器当前目录下面
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            public bool FileExist(string RemoteFileName)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName))
                    {
                        throw new Exception("文件名非法！");
                    }
                    FileStruct[] listFile = ListFiles();
                    foreach (FileStruct file in listFile)
                    {
                        if (file.Name == RemoteFileName)
                        {
                            return true;
                        }
                    }
                    return false;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 删除文件
            /// <summary>
            /// 从FTP服务器上面删除一个文件
            /// </summary>
            /// <param name="RemoteFileName">远程文件名</param>
            public void DeleteFile(string RemoteFileName)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName))
                    {
                        throw new Exception("文件名非法！");
                    }
                    Response = Open(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.DeleteFile);
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 重命名文件
            /// <summary>
            /// 更改一个文件的名称或一个目录的名称
            /// </summary>
            /// <param name="RemoteFileName">原始文件或目录名称</param>
            /// <param name="NewFileName">新的文件或目录的名称</param>
            public bool ReName(string RemoteFileName, string NewFileName)
            {
                try
                {
                    if (!IsValidFileChars(RemoteFileName) || !IsValidFileChars(NewFileName))
                    {
                        throw new Exception("文件名非法！");
                    }
                    if (RemoteFileName == NewFileName)
                    {
                        return true;
                    }
                    if (FileExist(RemoteFileName))
                    {
                        Request = OpenRequest(new Uri(this.Uri.ToString() + RemoteFileName), WebRequestMethods.Ftp.Rename);
                        Request.RenameTo = NewFileName;
                        Response = (FtpWebResponse)Request.GetResponse();

                    }
                    else
                    {
                        throw new Exception("文件在服务器上不存在！");
                    }
                    return true;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 拷贝、移动文件
            /// <summary>
            /// 把当前目录下面的一个文件拷贝到服务器上面另外的目录中，注意，拷贝文件之后，当前工作目录还是文件原来所在的目录
            /// </summary>
            /// <param name="RemoteFile">当前目录下的文件名</param>
            /// <param name="DirectoryName">新目录名称。
            /// 说明：如果新目录是当前目录的子目录，则直接指定子目录。如: SubDirectory1/SubDirectory2 ；
            /// 如果新目录不是当前目录的子目录，则必须从根目录一级一级的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
            /// </param>
            /// <returns></returns>
            public bool CopyFileToAnotherDirectory(string RemoteFile, string DirectoryName)
            {
                string CurrentWorkDir = this.DirectoryPath;
                try
                {
                    byte[] bt = DownloadFile(RemoteFile);
                    GotoDirectory(DirectoryName);
                    bool Success = UploadFile(bt, RemoteFile, false);
                    this.DirectoryPath = CurrentWorkDir;
                    return Success;
                }
                catch (Exception ep)
                {
                    this.DirectoryPath = CurrentWorkDir;
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 把当前目录下面的一个文件移动到服务器上面另外的目录中，注意，移动文件之后，当前工作目录还是文件原来所在的目录
            /// </summary>
            /// <param name="RemoteFile">当前目录下的文件名</param>
            /// <param name="DirectoryName">新目录名称。
            /// 说明：如果新目录是当前目录的子目录，则直接指定子目录。如: SubDirectory1/SubDirectory2 ；
            /// 如果新目录不是当前目录的子目录，则必须从根目录一级一级的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
            /// </param>
            /// <returns></returns>
            public bool MoveFileToAnotherDirectory(string RemoteFile, string DirectoryName)
            {
                string CurrentWorkDir = this.DirectoryPath;
                try
                {
                    if (DirectoryName == "")
                        return false;
                    if (!DirectoryName.StartsWith("/"))
                        DirectoryName = "/" + DirectoryName;
                    if (!DirectoryName.EndsWith("/"))
                        DirectoryName += "/";
                    bool Success = ReName(RemoteFile, DirectoryName + RemoteFile);
                    this.DirectoryPath = CurrentWorkDir;
                    return Success;
                }
                catch (Exception ep)
                {
                    this.DirectoryPath = CurrentWorkDir;
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 建立、删除子目录
            /// <summary>
            /// 在FTP服务器上当前工作目录建立一个子目录
            /// </summary>
            /// <param name="DirectoryName">子目录名称</param>
            public bool MakeDirectory(string DirectoryName)
            {
                try
                {
                    if (!IsValidPathChars(DirectoryName))
                    {
                        throw new Exception("目录名非法！");
                    }
                    if (DirectoryExist(DirectoryName))
                    {
                        throw new Exception("服务器上面已经存在同名的文件名或目录名！");
                    }
                    Response = Open(new Uri(this.Uri.ToString() + DirectoryName), WebRequestMethods.Ftp.MakeDirectory);
                    return true;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 从当前工作目录中删除一个子目录
            /// </summary>
            /// <param name="DirectoryName">子目录名称</param>
            public bool RemoveDirectory(string DirectoryName)
            {
                try
                {
                    if (!IsValidPathChars(DirectoryName))
                    {
                        throw new Exception("目录名非法！");
                    }
                    if (!DirectoryExist(DirectoryName))
                    {
                        throw new Exception("服务器上面不存在指定的文件名或目录名！");
                    }
                    Response = Open(new Uri(this.Uri.ToString() + DirectoryName), WebRequestMethods.Ftp.RemoveDirectory);
                    return true;
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            #endregion

            #region 文件、目录名称有效性判断
            /// <summary>
            /// 判断目录名中字符是否合法
            /// </summary>
            /// <param name="DirectoryName">目录名称</param>
            public bool IsValidPathChars(string DirectoryName)
            {
                char[] invalidPathChars = Path.GetInvalidPathChars();
                char[] DirChar = DirectoryName.ToCharArray();
                foreach (char C in DirChar)
                {
                    if (Array.BinarySearch(invalidPathChars, C) >= 0)
                    {
                        return false;
                    }
                }
                return true;
            }
            /// <summary>
            /// 判断文件名中字符是否合法
            /// </summary>
            /// <param name="FileName">文件名称</param>
            public bool IsValidFileChars(string FileName)
            {
                char[] invalidFileChars = Path.GetInvalidFileNameChars();
                char[] NameChar = FileName.ToCharArray();
                foreach (char C in NameChar)
                {
                    if (Array.BinarySearch(invalidFileChars, C) >= 0)
                    {
                        return false;
                    }
                }
                return true;
            }
            #endregion

            #region 目录切换操作
            /// <summary>
            /// 进入一个目录
            /// </summary>
            /// <param name="DirectoryName">
            /// 新目录的名字。 
            /// 说明：如果新目录是当前目录的子目录，则直接指定子目录。如: SubDirectory1/SubDirectory2 ； 
            /// 如果新目录不是当前目录的子目录，则必须从根目录一级一级的指定。如： ./NewDirectory/SubDirectory1/SubDirectory2
            /// </param>
            public bool GotoDirectory(string DirectoryName)
            {
                string CurrentWorkPath = this.DirectoryPath;
                try
                {
                    DirectoryName = DirectoryName.Replace("\\", "/");
                    string[] DirectoryNames = DirectoryName.Split(new char[] { '/' });
                    if (DirectoryNames[0] == ".")
                    {
                        this.DirectoryPath = "/";
                        if (DirectoryNames.Length == 1)
                        {
                            return true;
                        }
                        Array.Clear(DirectoryNames, 0, 1);
                    }
                    bool Success = false;
                    foreach (string dir in DirectoryNames)
                    {
                        if (dir != null)
                        {
                            Success = EnterOneSubDirectory(dir);
                            if (!Success)
                            {
                                this.DirectoryPath = CurrentWorkPath;
                                return false;
                            }
                        }
                    }
                    return Success;

                }
                catch (Exception ep)
                {
                    this.DirectoryPath = CurrentWorkPath;
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 从当前工作目录进入一个子目录
            /// </summary>
            /// <param name="DirectoryName">子目录名称</param>
            private bool EnterOneSubDirectory(string DirectoryName)
            {
                try
                {
                    if (DirectoryName.IndexOf("/") >= 0 || !IsValidPathChars(DirectoryName))
                    {
                        throw new Exception("目录名非法!");
                    }
                    if (DirectoryName.Length > 0 && DirectoryExist(DirectoryName))
                    {
                        if (!DirectoryName.EndsWith("/"))
                        {
                            DirectoryName += "/";
                        }
                        _DirectoryPath += DirectoryName;
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                catch (Exception ep)
                {
                    ErrorMsg = ep.ToString();
                    throw ep;
                }
            }
            /// <summary>
            /// 从当前工作目录往上一级目录
            /// </summary>
            public bool ComeoutDirectory()
            {
                if (_DirectoryPath == "/")
                {
                    ErrorMsg = "当前目录已经是根目录！";
                    throw new Exception("当前目录已经是根目录！");
                }
                char[] sp = new char[1] { '/' };

                string[] strDir = _DirectoryPath.Split(sp, StringSplitOptions.RemoveEmptyEntries);
                if (strDir.Length == 1)
                {
                    _DirectoryPath = "/";
                }
                else
                {
                    _DirectoryPath = String.Join("/", strDir, 0, strDir.Length - 1);
                }
                return true;

            }
            #endregion

            #region 重载WebClient，支持FTP进度
            internal class MyWebClient : WebClient
            {
                protected override WebRequest GetWebRequest(Uri address)
                {
                    FtpWebRequest req = (FtpWebRequest)base.GetWebRequest(address);
                    req.UsePassive = false;
                    return req;
                }
            }
            #endregion
        }
    }
}
